CN1754755A

CN1754755A - Low bottom vehicle

Info

Publication number: CN1754755A
Application number: CNA2005100923703A
Authority: CN
Inventors: 中野润一
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2004-09-29
Filing date: 2005-08-29
Publication date: 2006-04-05
Anticipated expiration: 2025-08-29
Also published as: JP2006096117A; KR20060050552A; TWI270495B; ITTO20050646A1; CN100436242C; TW200610691A; KR100715175B1

Abstract

To provide a low-floor type vehicle structured so that rear wheels are borne in the rear part of a swing arm borne by the body frame swingably up and down, a rear cushion is installed between the swing arm and the body frame, and that an accommodating member is installed in a part under the seat whereon a driver is seated and over the rear cushion, wherein such an arrangement is introduced that the bottom wall of the accommodating member can be set in a still lower position while a gap is reserved in the area to the rear cushion, and thereby the accommodating capacity of the accommodating member is secured large. At the undersurface of the bottom wall 140a of the accommodating member 140, an accommodation recess 142 to accommodate the rear cushion 72 is formed in such an arrangement that the center axis of the rear cushion 72 is positioned over the undersurface of the bottom wall 140a.

Description

Low bottom vehicle

Technical field

The present invention relates on axle trailing wheel is arranged by the rear portion of the vehicle frame supporting and the swing arm that can fluctuate, between swing arm and vehicle frame, be provided with posterior bumper, the vehicle driver take by bus with the seat below and dispose the low bottom vehicle of storage member above the posterior bumper.

Background technology

This low bottom vehicle for example is disclosed in patent documentation 1.

Patent documentation 1: the spy opens the 2004-116423 communique

But in described patent documentation 1 in the disclosed small motorcycle, storage member is the top that the bottom surface of receiver is configured in posterior bumper, and posterior bumper between need to be provided with on the basis in gap, when wanting to set its bottom surface lowlyer, then be restricted in order to ensure the capacity of receiver.

Summary of the invention

The present invention is in light of this situation and exploitation, and purpose provides a kind of low bottom vehicle, its and posterior bumper between guarantee the gap, and can be set in lower position to the diapire of storage member, can guarantee storage member to take in capacity big.

In order to reach described purpose, scheme 1 described low bottom vehicle of the present invention, axle supporting wheels on the rear portion of the swing arm of supporting by vehicle frame and can fluctuate, between swing arm and vehicle frame, be provided with posterior bumper, the vehicle driver take by bus with the seat below and dispose storage member above the posterior bumper, the recess of accommodating of described posterior bumper is accommodated in the setting below described storage member diapire of this low bottom vehicle, makes the central axis of posterior bumper be positioned at top position below the described diapire.

Scheme 2 described inventions are that described storage member is a receiver of taking in helmet etc. on the basis of the structure of such scheme 1 described invention.

Scheme 3 described inventions are that described storage member is the tanks of taking in fuel on the basis of the structure of such scheme 1 described invention.

Scheme 4 described inventions, be on the basis of the structure of such scheme 2 described inventions, described posterior bumper has the axis that extends along fore-and-aft direction, and is arranged between swing arm and the vehicle frame, describedly accommodates the central portion that recess is arranged on described receiver diapire Width.

Scheme 5 described inventions are that the described recess of accommodating forms to such an extent that can be housed in ejection-type (the ジエ Star ト type) helmet in the described receiver under the state that its anti-dazzle device is opened on the basis of the structure of such scheme 4 described inventions.

According to scheme 1 described invention, because posterior bumper is taken in accommodating of being provided with below the storage member diapire in the recess, and the central axis that makes posterior bumper is positioned at the place, top position below the described storage member diapire, so, and posterior bumper between guarantee the gap, and can be set in lower position to the diapire of storage member, can guarantee the capacity of taking in that storage member is big.

According to scheme 2 or scheme 3 described inventions, can avoid the diapire of receiver or tanks being set in lower position with the interference of posterior bumper, can guarantee the capacity that receiver or tanks are big.

According to scheme 4 described inventions, can increase the volume of receiver Width both sides.

According to scheme 5 described inventions, can be effectively the ejection-type helmet accepting in receiver.

Description of drawings

Fig. 1 is the lateral plan of the first embodiment small motorcycle;

Fig. 2 is the vertical profile lateral plan that the front portion of small motorcycle is amplified expression;

Fig. 3 is the front elevation of driving engine;

Fig. 4 is the 4-4 line amplification profile of Fig. 1;

Fig. 5 is the vertical profile lateral plan that the rear portion of small motorcycle is amplified expression;

Fig. 6 is the 6-6 line section-drawing of Fig. 5;

Fig. 7 is the lateral plan of the second embodiment small motorcycle;

Fig. 8 is the vertical profile lateral plan that the front portion of small motorcycle is amplified expression;

Fig. 9 is the planar view that has omitted the power unit under the air gulp system state;

Figure 10 be Fig. 9 10 to view;

Figure 11 be Fig. 9 11 to view;

Figure 12 is the 12-12 line section-drawing of Fig. 7;

Figure 13 is the lateral plan of the 3rd embodiment small motorcycle;

Figure 14 is the vertical profile lateral plan that the front portion of small motorcycle is amplified expression;

Figure 15 is the lateral plan of the 4th embodiment small motorcycle.

The specific embodiment

What Fig. 1～Fig. 6 represented is the first embodiment of the present invention, Fig. 1 is the lateral plan of small motorcycle, Fig. 2 is the vertical profile lateral plan that the front portion of small motorcycle is amplified expression, Fig. 3 is the front elevation of driving engine, Fig. 4 is the 4-4 line amplification profile of Fig. 1, Fig. 5 is the vertical profile lateral plan that the rear portion of small motorcycle is amplified expression, and Fig. 6 is the 6-6 line section-drawing of Fig. 5.

At first, in Fig. 1, the vehicle frame F of this small motorcycle comprises: head pipe 17, and it can turn to twelve Earthly Branches to honour front-wheel WF to carry out the front fork 15 of axle supporting and be connected bogie car on this front fork 15 16; Pair of right and left down pipe 18 ..., it extends down backward from this head pipe 17; Manage 19 under the pair of right and left ..., it is positioned at these down pipes 18 ... the below, connect and to be arranged on the described head pipe 17, and than two down pipes 18 ... extend down backward more obliquely; Pair of right and left is responsible for 20 ..., its connection is arranged on these pipes 19 down ... the lower end and rearward extend described two down pipes 18 simultaneously ... the lower end connect and to be arranged on the intermediate portion.

At described pipe 19 down ... the lower end engage along these guiding rocking arms 19 ... extending direction on the driving engine suspension apparatus carriage 19a that extends ...The described person in charge 20 ..., under manage 19 ... with driving engine suspension apparatus carriage 19a ... the junction surface nearby rearward extend driving engine suspension apparatus carriage 19a in the present embodiment ... have to being responsible for 20 ... following pipe 19 ... the lower end bonded assembly link functions of components.The double-type down pipe 18 in the left and right sides ... with following pipe 19 ... pars intermedia between be provided with and strengthen with coupling plate 21 ...

In conjunction with Fig. 2, the described person in charge 20 is the preceding half rake 20a that extend backward by from the described lower end of pipe 19 down, the later half rake 20b that extends down and stick out crooked like that upward and bonded assembly curve 20c between the front end of the rear end of preceding half rake 20a and later half rake 20b linked into an integrated entity and constituted backward, shown in Figure 3 as described later, it is made of the above-below direction tetragonal square tube of approximate right angle longer than left and right directions.And the lower end of described down pipe 18 is by being welded to connect on the pars intermedia that is arranged on preceding half rake 20a.

Engaged coupling plate 22 by welding on the front portion of described later half rake 20b, front end and the described coupling plate 22 of going up the seat rail 23 that extends backward link, and the seat rail 23 of pair of right and left ... the rear portion interconnect and be integral.In the present embodiment, the part of described coupling plate 22 front is configured to ride on the curve 20c, like this, just can be combined in coupling plate 22 and seat rail 23 efficiently on the front portion of being responsible for 20 later half rake 20b.In addition, utilize welding front end to be connected the back pipe 24 that also upward extends backward on the rear end of later half rake 20b ... the rear end be bonded on seat rail 23 respectively ... the rear portion on.And in the left and right sides double-type seat rail 23 ... with back pipe 24 ... pars intermedia between, be provided with the coupling plate 25 that strengthens usefulness ...

Simultaneously with reference to Fig. 3, be equipped with on the vehicle frame F by four-stroke driving engine EA with the output of this driving engine EA and carry out the power unit PA that the stepless speed changer M of speed change is constituted, it drives trailing wheel WR.Described driving engine EA for example is the structure of water cooling type single cylinder, and it has: crankcase 28; Cylinder block 29, it has the cylinder-bore axis that extends up and down, and extends upward from crankcase 28; Cylinder head 30, it is combined on the cylinder block 29 at the opposition side with crankcase 28; Cylinder-cover jacket 31, it is combined on the top of cylinder head 30.

Down pipe 18 in described vehicle frame F ... the lower end nearby described two is responsible for 20 ... preceding half rake 20a ... be provided with the first driving engine suspension apparatus 32 ..., the top of crankcase 28 is bearing in the first driving engine suspension apparatus 32 in the place ahead of the cylinder block 29 of described driving engine EA ... on.Be connected in pipe 19 down ... the driving engine suspension apparatus carriage 19a of lower end ... the lower end by pair of bolts 43 the second driving engine suspension apparatus 33 is installed ..., the front side bottom of crankcase 28 is by the bolt 44 fastening second driving engine suspension apparatus 33 that are bearing in ... on.

Like this, utilize the high part of rigidity just can be bearing in two to driving engine EA and be responsible for 20 ... on, and the first driving engine suspension apparatus 32 ... be by clip described down pipe 18 from both sides ... the pair of bolts 26 of the extended line of line of centers ... fastening and be arranged on two and be responsible for 20 ... preceding half rake 20a ... on, the crankcase 28 of described driving engine EA is by being configured in described down pipe 18 ... bolt 27 on the line of centers extended line fastening and be bearing in the first driving engine suspension apparatus 32 ... on, can be bearing in the first driving engine suspension apparatus 32 to crankcase 28 high efficiencys and further raising rigidly ... on.

Among Fig. 4, bent axle 34 is bearing in the crankcase 28 and can rotates freely, it possesses a pair of

crank arm

34a, 34a integratedly and is attached at Crankpin 34b between these crank arms 34a, the 34a, and the piston 35 that is entrenched in sliding freely in the cylinder block 29 is connected on the Crankpin 34b between described two crank arm 34a, the 34a by union lever 36.

In left side along the autobicycle direct of travel, one end of bent axle 34 is outstanding from crankcase 28, constitute AC electrical generator 39 by the rotor on the end that is fixed on this bent axle 34 37 and the stators 38 that are housed in this rotor 37, this AC electrical generator 39 is bonded to 40 coverings of left side cover on the crankcase 28, and described stator 38 is fixed on the left side cover 40.

Described cylinder head 30 is provided with air suction valve and blow off valve (not shown), constitute a valve device part of controlling described air suction valve of switching and blow off valve and be bearing in the camshaft 41 that can rotate freely on the described cylinder head 30, and between the bent axle 34 of 39 of described crankcase 28 and AC electrical generators, be provided with regularly driving device 42, the rotary power of bent axle 34 is decelerated to 1/2 by described timing driving device 42, and transmits to described camshaft 41.

On right side along the autobicycle direct of travel, the box main body 45 that rearward extends from this crankcase 28 is connected on the described crankcase 28, by being fastened on right side cover 46 on these box main body 45 right sides, being fastened on gear case 47 on the right side, described box main body 45 rear portion and described box main body 45 and constituting variable-speed motor housing 48, between box main body 45 and right cover 46, be formed with speed change chamber 49, between box main body 45 and gear case 47, be formed with gear chamber 50.

In the speed change chamber 49 of described variable-speed motor housing 48, contain the stepless speed changer M of belt, it is used for that the rotary power of bent axle 34 carried out stepless change and to the rear wheel-side transmission.This stepless speed changer M comprises: driving pulley 51, and it is installed on the other end that faces the bent axle 34 in the speed change chamber 49; Driven pulley 52, it is installed in has the axis parallel with bent axle 34, is supported on variable-speed motor housing 48 rear portions and the facing on the part in the speed change chamber 49 of the transmission shaft 54 that can rotate freely; Endless belt 53, it is around hanging on driving pulley 51 and the driven pulley 52.

Driving pulley 51, by by the action of not shown motor etc. at the sliding action of the sliding cylinder 56 of described bent axle 34 axial enterprising line slips, can make described with 53 around hanging change in radius.Driven pulley 52 is according to changing to a side opposite with driving pulley 51 around hanging radius, between this driven pulley 52 and transmission shaft 54 centrifugal clutch 55 being installed around the variation of hanging radius with 53 on the driving pulley 51.

Gear chamber 50 configurations are faced in the other end side of described transmission shaft 54, have the output shaft 57 that parallels to the axis with this transmission shaft 54 and can rotate freely, contain in the gear chamber 50 and the rotary power of described transmission shaft 54 slowed down and to the train of reduction gears 58 of described output shaft 57 transmission by box main body 45 and gear case 47 supportings.One end of described output shaft 57 is run through the rear portion of gear case 47 and is given prominence in the left side, rear portion of gear case 47.

59 rear portions that are bearing in swing arm 60 of the axletree of trailing wheel WR, the front end of this swing arm 60 are provided with a pair of supporting

shank

60a, 60b, and they are clamping mutually between the rear portion of box main body 45 that constitutes described variable-speed motor housing 48 parts and gear case 47.The relative free rotary ground supporting of supporting shank 60a of one side is on described output shaft 57, and the supporting shank 60b of opposite side is by fulcrum 61 rotatably supports, and this fulcrum 61 is coaxial with described output shaft 57, and is arranged on described box main body 45 rear portions.The leading section that is swing arm 60 is supported on the variable-speed motor housing 48, can shake up and down.

One end of described output shaft 57 is outstanding from the supporting shank 60a that described swing arm 60 is possessed, and is fixed with drive sprocket 62 at this output shaft 57 from the outstanding protrusion of described supporting shank 60a.And along being fixed with driven sprocket 63 on the axletree 59 of the left side trailing wheel WR of autobicycle direct of travel, on drive sprocket 62 and driven sprocket 63 around the chain 64 that hangs with ring-type.And the chain wheel cover 65 that covers drive sprocket 62 is installed at the front end exterior side of described supporting shank 60a.

Be provided with a pair of carriage 66 that extends upward at the rear portion of described variable-speed motor housing 48 ..., these carriages 66 ... be bearing in and be responsible for 20 ... rearward end on.As shown in Figure 1, be provided with a pair of main support axle 67 coaxially in the rear side bottom of variable-speed motor housing 48 ..., with these main support axles 67 ... rotatably support main support 68.Cross pipe 71 is erected at described two and is responsible for 20 ... curve 20c ... between, and at this cross pipe 71 and be arranged on buffering on described swing arm 60 front portions and the posterior bumper 72 with the axis that extends along front and back be set between with carriage 60c.

Be conceived to Fig. 2, the downstream end of throttle valve body 74 is connected on the front side side of cylinder head 30.Tanks 90A is configured to cross over two down pipes 18 of vehicle frame F ...,, fuel injection valve 77 is installed on throttle valve body 74 being connected with the place ahead that is configured in driving engine EA on the upstream extremity of throttle valve body 74 and being airfilter 76A below the described tanks 90A.

Airfilter 76A accommodates filter element 149 and constitutes in filter case 148.Filter case 148 following formation, bowl-shape first housing parts of opening rearward 150 and bowl-shape second housing parts of forwards opening 151 are clamped in filter element 149 between the periphery of two housings parts 150,151 and combination, and filter element 149 is the decontamination chamber 153 at not decontamination chamber 152 that is divided into the place ahead in the filter case 148 and rear.

First housing parts 150 is provided with the outside atmosphere ingress pipe 154 that is communicated with decontamination chamber 152 not, its the place ahead from airfilter 76B imports outside atmosphere, aspirate tube 155 is housed in the decontamination chamber 153, and it is connected downstream end on the upstream extremity of throttle valve body 74 by second housing parts 151.

The radiator 91 that cools off usefulness by the warmed-up engine cooling water of watercooled engine EA, make this radiator 91 be positioned at the place ahead of driving engine EA in the lower front configuration of first housing parts 150 of airfilter 76A.The second driving engine suspension apparatus 33 that possesses to vehicle frame F is set in the bottom of this radiator 91 ... side-prominent installation shank 168 ..., this installs shank 168 ... by supporting yielding rubber 170 ... be bearing in and be arranged at the second driving engine suspension apparatus 33 ... on carriage 169 ... on.Be provided with the following pipe 19 above it on the top of radiator 91 ... side-prominent installation shank 171 ..., described installation shank 171 ... by not shown supporting yielding rubber be bearing in be arranged at down the pipe 19 ... on carriage 172 ... on.It is the following pipe 19 that radiator 91 is bearing in vehicle frame F ... with the second driving engine suspension apparatus 33 ... on.

Bottom at first housing parts 150 of filter case 148 parts that constitute described airfilter 76A, be wholely set handlebar from the side directed deflector shield 156 of the wind direction radiator 91 of travelling in the place ahead, this deflector shield 156 has a down dip after radiator 91 side direction from the front end bottom of filter case 148 and tiltedly extends.

The upstream extremity of freeing pipe 95 is connected on the rear side of cylinder head 30 of driving engine EA, and the downstream end of this freeing pipe 95 is connected on the exhaust gas silencer 97 that is disposed at trailing wheel WR right side.

As shown in Figure 2, the place ahead at the head pipe 17 of vehicle frame F front end is provided with lockout mechanism 101, its changeable bogie car is 16 lock-out state and unlock state, and this lockout mechanism 101 carries out change action by the operation that is configured in the cylinder lock 102 that leaves lockout mechanism 101 positions.

Be fixed with a part 111 that extends to its place ahead oblique upper on the head pipe 17, be equipped with in the upper end of this part 111 and be configured in bogie car the gauge panel 112 in 16 central portion the place aheads, the support unit 114 of supporting head lamp 113 is installed in the top of a part 111.

The cylinder 115 of cylinder lock 102 is installed on described measuring instrument 112 part 111 nearby, according to inserting the rotor 117 that supporting key 116 and rotating operation rotate, can in cylinder 115, insert rotationally, according to the rotation of this rotor 117 and linkage component 121 shakes action, like this, described lockout mechanism 101 can switch lock-out state and unlock state with regard to action.

Be conceived to Fig. 1, tanks 90A, airfilter 76A, power unit PA and vehicle frame F are synthesized car body cover 125 coverings that resin constitutes, and this car body cover 125 comprises: front shroud 126, and it covers the front portion of head pipe 17 and the top of front-wheel WF, and head lamp 113 is installed; Middle part cover 127, it covers head pipe 17 and tanks 90A from rear side, and links to each other with front shroud 126; Pair of right and left leg wind shield 128 ..., it is bonded on the left and right sides of described front shroud 126 and covers foot the place ahead of passenger; Pair of right and left pin placement section 129 ... (with reference to Fig. 3), the pin of its supporting passenger, and be connected leg wind shield 128 ... on; Backplane channel portion 130, it is at these pin placement sections 129 ... between protuberance upward, and be connected on the rear portion of middle part cover 127; Skirt section 131 ... (with reference to Fig. 3), it is respectively from described bipod placement section 129 ... outward flange hang down upward; Back cover 132, it covers the left and right sides at vehicle frame F rear portion, and is bonded on pin placement section 129 ... in backplane channel portion 130.

Can be provided with on the back cover 132 with opening and closing double seat type by bus with seat 133, when taking advantage of the steering operation bogie car 16 vehicle driver its year, but co-driver is taken at vehicle driver's rear.Should be by bus with seat 133, be configured in the rear of tanks 90A, by the middle part cover 127 that covers tanks 90A in the car body cover 125 from rear side, backplane channel portion 130 that links to each other with these cover 127 rear portions, middle part and the back cover 132 formed legs that are provided with described usefulness by bus seat 133 are by space 135, see it is U font roughly from the side, its be configured in the tanks 90A of described front side and airfilter 76A and rear side by bus with between the seat 133, two down pipes 18 of radiator 91 and vehicle frame F ... and twice pipes 19 ... also all be configured in described leg the place ahead by space 135.

Among Fig. 5 and Fig. 6, to dispose storage member below by bus with seat 133 be receiver 140 described, its upper end open portion by should be by bus with the base plate 141 at seat 133 can open and close the pass close, this receiver 140 is by described seat rail 23 ... with back pipe 24 ... supporting.

Receiver 140 have along the axis that extends at fore-and-aft direction and be arranged on the cross pipe 71 of vehicle frame F and the posterior bumper 72 between the swing arm 60 above, on the diapire 140a of receiver 140, be provided with accommodate described posterior bumper 72 accommodate recess 142, make the axis of posterior bumper 72 be positioned at top position below the described diapire 140a.As shown in Figure 6, this accommodates the central portion that recess 142 is configured in receiver 140 Widths, and this recess 142 of accommodating forms to such an extent that can be housed in the ejection-type helmet 143 in the receiver 140 under the state that its anti-dazzle device 144 starts.

The following describes the effect of this first embodiment, the head pipe 17 of vehicle frame F front end and operation can be turned to by this pipe 17 that twelve Earthly Branches forward that vehicle driver to handlebar 16 takes by bus with seat 133 between dispose see it roughly is that the leg of U word shape passes through space 135 from the side, by forming on the car body cover 125, vehicle frame F possesses: pair of right and left down pipe 18 ..., from the beginning it manage 17 at leg by the place ahead in space 135 and extend down backward; Manage 19 under the pair of right and left ..., it is configured in these down pipes 18 ... in the time of the below, from the beginning manage 17 and extend down backward; Pair of right and left is responsible for 20 ... it manages 19 down from these ... lower end when rearward extending, make two down pipes 18 ... the lower end connect and to be arranged on the pars intermedia, being responsible for 20 connects following parts one and constitutes: promptly, connect preceding half rake 20a, the later half rake 20b that extends down backward that is arranged on the pars intermedia and the bending like that sticks out upward from the described down lower end that makes two down pipes 18 when extend backward the lower end of pipe 19 also bonded assembly curve 20c between the front end of the rear end of preceding half rake 20a and later half rake 20b.

Structure according to this vehicle frame F, because being responsible for 20 is to form from managing 19 lower end down to extend backward, and the shape of extending down backward after the bending up, so, can obtain the space of being responsible for 20 belows greatlyyer, increase the degree of freedom of driving engine EA shape, simultaneously, owing to can also suitably make the curve 20c that is responsible in the middle of 20, so can seek the optimization of road-holding property.

At down pipe 18 ... the lower end nearby be responsible for 20 ... preceding half rake 20a ... be provided with the first driving engine suspension apparatus 32 of supporting engine EA ... so by with down pipe 18 ... binding and the part of rigidity grow comes driving engine EA is bearing in the person in charge 20 ... on, can and be bearing on the vehicle frame F reliably driving engine EA high efficiency.

The pair of right and left seat rail 23 that extends is gone up in supporting by bus backward with seat 133 ... front end be bonded on two respectively and be responsible for 20 ... later half rake 20b ... the front portion on, like this, can suitably form and be responsible for 20 ... with seat rail 23 ... the angle that is constituted, can improve seat rail 23 ... to being responsible for 20 ... the rigidity that engages can also make balance become good.

And be responsible for 20 ... constituted by square tube with above-below direction right angle quadrangle transverse shape longer than left and right directions, so, be responsible for 20 ... above-below direction rigidity height, and have flexiblely on the left and right directions, can obtain more appropriate road-holding property.

Trailing wheel WR axle is bearing in the front portion of the swing arm 60 at its rear portion, may support by gear box casing 48 with fluctuating, be arranged between vehicle frame F and the swing arm 60 and have the posterior bumper 72 that extends axis along fore-and-aft direction above, and be the vehicle driver take by bus dispose receiver 140 with the below at seat 133, what described posterior bumper 72 was accommodated in setting below the diapire 140a of receiver 140 accommodates recess 142, make the central axis of posterior bumper 72 be positioned at top position below the described diapire 140a, so can the gap be set on one side and between the posterior bumper 72, the diapire 140a of receiver 140 is set in lower position on one side, can guarantees to increase the capacity of receiver 140.

Because posterior bumper 72 has along the axis of fore-and-aft direction extension and is arranged between swing arm 60 and the vehicle frame F, Width central portion at the diapire 140a of described receiver 140 is provided with the described recess 142 of accommodating, so, can increase the volume of receiver 140 Width both sides, because accommodating recess 142 is formed to such an extent that can be housed in the ejection-type helmet 143 in the receiver 140 under the state that its anti-dazzle device 144 is raised, so, can be housed in the ejection-type helmet 143 effectively in the receiver 140.

At the place ahead of driving engine EA configuration radiator 91, configuration airfilter 76A above this radiator 91, for handle is arranged on the deflector shield 156 one connection of extending to radiator 91 sides on the filter case 148 of airfilter 76A from the travelling the wind channeling conduct of the place ahead, so, when reducing the part number, can come cooling radiator 91 to the wind that travels to radiator 91 side channeling conducts effectively.

And leg is the rears that are configured in tanks 90A, airfilter 76A and radiator 91 by space 135, so in small motorcycle, can guarantee the capacity of tanks 90A and airfilter 76A, rear at radiator 91 does not dispose bulky parts, and can more bring the wind effect of deflector shield 156 into play.

Be spaced from each other lockout mechanism 101 that configuration can switch bogie car to 16 lock-out state and unlock state and the blocked operation masterpiece is used in cylinder lock 102 on this lockout mechanism 101, one end of linkage component 121 is attached on the rotor 117 of cylinder lock 102, and shake according to the rotation of this rotor 117, described lockout mechanism 101 can switch the action of lock-out state and unlock state according to shaking of described linkage component 121, and is connected with the other end of linkage component 121.

Therefore, from the operating effort of cylinder lock 102 by shaking of linkage component 121 to lockout mechanism 101 side transmission, can reduce the part number and constitute operating effort transferring structure between cylinder lock 102 and the lockout mechanism 101 simply, and in the operation of cylinder lock 102, can obtain the appropriateness sense, can improve its commodity.

Since cylinder lock 102 bogie car the place ahead of 16 is configured in measuring instrument 112 near, so the vehicle driver can carry out the operation of cylinder lock 102 easily.

Fig. 7 is the lateral plan of second embodiment of the invention small motorcycle, Fig. 8 is the vertical profile lateral plan that the front portion of small motorcycle is amplified expression, Fig. 9 is the planar view that has omitted the power unit under the air gulp system state, Figure 10 be Fig. 9 10 to view, Figure 11 be Fig. 9 11 to view, Figure 12 is the 12-12 line section-drawing of Fig. 7, illustrates only paying identical reference marks with the cooresponding part of described first embodiment place, and omits its detailed explanation.

At first among Fig. 7 and Fig. 8, the vehicle frame F of this small motorcycle is identical structure with described first embodiment's, be equipped with on this vehicle frame F by four-stroke driving engine EB with the output of this driving engine EB and carry out the power unit PB that the stepless speed changer M of speed change is constituted, it drives trailing wheel WR.

With reference to Fig. 9～Figure 11, described driving engine EB for example is the V-structure of the two cylinders of water-cooled together, and it has: crankcase 28; Anterior rake BF, the cylinder-bore axis that it leans forward on having a little forward also extends upward from crankcase 28; Rear portion rake BR, itself and this rake BF forming V-shape ground, front portion forwards extends from described crankcase 28, and each rake BF, BR possess respectively:

cylinder block

29F, 29R, it is combined on the crankcase 28;

Cylinder head

30F, 30R, it is combined on cylinder block 29F, the 29R at the opposition side with crankcase 28; Cylinder-

cover jacket

31F, 31R, it is combined on the top of

cylinder head

30F, 30R.

Down pipe 18 in vehicle frame F ... the lower end nearby described two is responsible for 20 ... preceding half rake 20a ... be provided with the first driving engine suspension apparatus 32 ... the top of crankcase 28 is bearing in this first driving engine suspension apparatus 32 between front and rear rake BF, the BR of driving engine EB ... on, rear portion rake BR is configured in two and is responsible for 20 ... curve 20c ... between.The bottom of described crankcase 28 is bearing in to be integrally formed at below described anterior rake BF is responsible for 20 ... the second driving engine suspension apparatus 33 of front end ... on.

Like this, utilize the high part of rigidity just can be bearing in two to driving engine EB and be responsible for 20 ... on, and the first driving engine suspension apparatus 32 ... be by described down pipe 18 ... the pair of bolts 26 that the extended line of line of centers is clamped from both sides ... fastening and be arranged on two and be responsible for 20 ... preceding half rake 20a ... on, the crankcase 28 of described driving engine EB is by being configured in described down pipe 18 ... bolt 27 on the line of centers extended line fastening and be bearing in the first driving engine suspension apparatus 32 ... on, can be bearing in the first driving engine suspension apparatus 32 to crankcase 28 high efficiencys and raising rigidly ... on.

Among Figure 12, the piston 35 of described two rake BF, BR ... by union lever 36 ... be connected jointly on the Crankpin 34b between two crank arm 34a, the 34b that the bent axle 34 that is supported on the crankcase 28 and can rotates freely possessed.

On cylinder head 30F, the 30R of described two rake BF, BR, be respectively arranged with air suction valve and blow off valve (not shown), constituting the valve device part that control opens and closes them, and be bearing in the camshaft 41 that can rotate freely respectively on described two cylinder head 30F, the 30R ... and between the bent axle 34 of 39 of described crankcase 28 and AC electrical generators, be provided with regularly driving device 42, the rotary power of bent axle 34 is decelerated to 1/2 by described timing driving device 42, and transmits to described camshaft 41.

Be provided with a pair of carriage 66 that extends upward at the rear portion that is incorporated into the variable-speed motor housing 48 on the crankcase 28 ..., this a pair of carriage 66 ... be bearing in and be responsible for 20 ... rearward end on.Cross pipe 71 is erected at two and is responsible for 20 ... curve 20c ... between, and at this cross pipe 71 and be arranged on buffering on described swing arm 60 front portions and the posterior bumper 72 with the axis that extends along front and back be set between with carriage 60c.

Be conceived to Fig. 8, the air gulp system 73 of driving engine EB possesses:

throttle valve body

74F, 74R, and its downstream end is forwardly and be connected between rear portion rake BF, the BR on the side of

cylinder head

30F, 30R of these rakes BF, BR;

Aspirate tube

75F, 75R, it is connected on the upstream extremity of two

throttle valve body

74F, 74R; Airfilter 76B is configured in the top of described rake BF, jointly is connected with these

aspirate tubes

75F, 75R, and fuel injection valve 77F, 77R are installed on each

throttle valve body

74F, 74R.

Airfilter 76B accommodates filter element 79 and constitutes in filter case 78.Filter case 78 following formations, bowl-shape first housing parts of opening upward 80, has second housing parts 81 of spaced walls 81a that filter case 78 internal intervals is become the decontamination chamber 84 of the not decontamination chamber 83 of top and below integratedly, and bowl-shape the 3rd housing parts 82 opened of below is combined in the periphery clamping of second housing parts 81 between the periphery of the first and the

3rd housing parts

80,82, filter element 79 from upper side promptly not decontamination chamber's 83 sides be installed in removably on the opening 85 that is arranged on the described spaced walls 81a.

Described

aspirate tube

75F, 75R protrude in the decontamination chamber 84, are connected with filter case 78, are communicated with the suction hole 86 in decontamination chamber 83 not, are arranged on the sidepiece of the 3rd housing parts 82 of filter case 78.

The filter case 78 following formation of airfilter 76B, the length of its above-below direction is less than the length of fore-and-aft direction, above this airfilter 76B, cross over two down pipes 18 ... the tanks 90B of ground configuration, it installs, is bearing in the front portion of vehicle frame F, i.e. two down pipes 18 ... on.

The roof of the described filter case 78 i.e. roof 82a of the 3rd housing parts 82 extends along front and back approximate horizontal ground with respect to the diapire 90Ba of tanks 90B, the spaced walls 81a of second housing parts 81, and also approximate horizontal ground extends forwards, backwards.

Below the place ahead and described airfilter 76B of the anterior rake BF of described driving engine EB, dispose the radiator 91 that is cooled off usefulness by the warmed-up engine cooling water of watercooled engine EB, this radiator 91 is bearing in the following pipe 19 of vehicle frame F ... on.And this radiator 91, described tanks 90B and described airfilter 76B are configured in the place ahead that the leg that is formed by car body cover 125 passes through space 135.

In the bottom of the filter case 78 of described airfilter 76B promptly on first housing parts 80, be wholely set the deflector shield 92 of handlebar from wind direction radiator 91 guiding of travelling in the place ahead, this deflector shield 92 has a down dip after radiator 91 side direction from the front end bottom of filter case 78 and tiltedly extends.

As shown in Figure 9, rear portion at second housing parts 81 of the filter case 78 of airfilter 76B is provided with element exchange window 136, it faces described leg by space 135 sides, be used for the filter element 79 that is housed in this filter case 78 is exchanged, this element exchange window 136 is covered by cover 137 to be opened/closed.

The roof 82a of filter case 78 extends along front and back approximate horizontal ground with respect to the diapire 90Ba of tanks 90B, filter element 79 also is configured in the filter case 78 with the posture with respect to described roof 82a approximate horizontal, pulling out from described element with exchanging window 136 approximate horizontal.Corresponding described element exchange window 136 and backplane channel portion 130 is provided with peristome is with the insertion of the opening and closing operations that can carry out cover 137 and filter element 79 with extract.

The exhaust system 93 of driving engine EB possesses: freeing pipe 94, its upstream extremity are connected on the lower side of cylinder head 30F of described anterior rake BF, and rearward extend below power unit PB; Freeing pipe 95, its upstream extremity are connected on the rear side of cylinder head 30R of described rear portion rake BR; Set freeing pipe 96, it is connected on the downstream end of these freeing

pipes

94,95 jointly; Exhaust gas silencer 97, it is configured in the right side of trailing wheel WR and is connected on the set freeing pipe 96.

The freeing pipe 94 of anterior rake BF from cylinder head 30F downwards general curved become C word shape, and rearward extend by the below of described power unit PB, erect like that to the right side of trailing wheel WR at the rear of power unit PB to be formed, below the diapire 48a of the variable-speed motor housing 48 of a housing part that constitutes described power unit PB, be provided with accommodate described freeing pipe 94 tops at least accommodate recess 98.

As shown in figure 12, described accommodating between the crank arm 34a and driving pulley 51 of driving pulley 51 sides that recess 98 is configured in bent axle 34, like this, can avoid and the directly interference of bigger driving pulley 51, can below the diapire 48a of variable-speed motor housing 48, reasonably form and accommodate recess 98.

The freeing pipe 95 of rear portion rake BR is arranged side by side at the described freeing pipe 94 of the rear of main support axle 67 and anterior rake BF, and the ground, variable-speed motor housing 48 rear portions of diving from the left side of crankcase 28 is crooked and form.The freeing pipe 95 that is rear portion rake BR extends to the left side of crankcase 28 and variable-speed motor housing 48 from cylinder head 30R, and the rear portion of the variable-speed motor housing 48 of diving and forming side by side at the rear of described main support axle 67 and the described freeing pipe 94 of anterior rake BF.

Set freeing pipe 96 is connected on the downstream end of two freeing

pipes

94,95 of the rear side that is disposed at power unit PB side by side jointly, and the upstream extremity of exhaust gas silencer 97 is connected on the downstream end of this set freeing pipe 96.

The head pipe 17 of vehicle frame F front end is provided with lockout mechanism 101, its changeable bogie car is 16 lock-out state and unlock state, this lockout mechanism 101 and first embodiment are similarly, according to the action of shaking of the corresponding linkage component 121 of operation that is configured in the cylinder lock 102 that leaves lockout mechanism 101 positions, switch bogie car 16 lock-out state and unlock state.

Below by bus with seat 133, dispose receiver 140, its upper end open portion can close with base plate 141 places at seat 133 by bus at this with opening and closing and close, the diapire 140a of this receiver 140 go up to be provided with accommodate posterior bumper 72 accommodate recess 142, make the axis of posterior bumper 72 be positioned at top position below the described diapire 140a.

According to this second embodiment, with first embodiment similarly obtaining the space of being responsible for 20 belows bigger, increase the degree of freedom of driving engine EB shape, simultaneously, owing to can also suitably make the curve 20c that is responsible in the middle of 20, so can seek the optimization of road-holding property, by with down pipe 18 ... binding and the part of rigidity grow comes driving engine EB is bearing in the person in charge 20 ... on, can and be bearing on the vehicle frame F reliably driving engine EB high efficiency.

And posterior bumper 72 between the gap is set in, can be set in lower position to the diapire 140a of receiver 140, can guarantee the capacity of accommodating that receiver 140 is big.

Deflector shield 92 to the radiator 91 sides extension that is configured in driving engine EB the place ahead, because connecting, one is arranged on the filter case 78 of airfilter 76B, so, can reduce the part number, and can come cooling radiator 91 to the wind that travels to radiator 91 side channeling conducts effectively.

And leg is the rears that are configured in tanks 90B, airfilter 76B and radiator 91 by space 135, so in small motorcycle, can guarantee the capacity of tanks 90B and airfilter 76B, and the rear at radiator 91 does not dispose bulky parts, can more bring the wind effect of deflector shield 92 into play.

Can reduce the part number and just constitute operating effort transferring structure between cylinder lock 102 and the lockout mechanism 101 simply, and in the operation of cylinder lock 102, can obtain the appropriateness sense, can improve its commodity.

Be installed in the anterior rake BF of the V-type engine EB on the vehicle frame F, have cylinder block 29F and cylinder head 30F that cylinder-bore axis leans forward, right side at the crankcase 28 of this driving engine EB is combined with variable-speed motor housing 48, it accommodates the stepless speed changer M that constitutes power unit PB with driving engine EB, upstream extremity is connected freeing pipe 94 on the cylinder head 30F that cylinder-bore axis leans forward, rearward extend below by power unit PB, and below the diapire 48a of variable-speed motor housing 48 setting accommodate at least freeing pipe 94 top accommodate recess 98.

Therefore, can freeing pipe 94 more near power unit PB be configured in the top, like this, driving engine EB is configured in more lower position place with regard to guaranteeing minimum terrain clearance altitude, can seek the low center of gravityization of the small motorcycle of low bottom vehicle.

The freeing pipe 95 that links to each other on driving engine EB and the cylinder head 30R rear side that rear portion rake BR is possessed, rear and freeing pipe 94 at main support axle 67 are arranged side by side, the ground, variable-speed motor housing 48 rear portions of diving from the left side of crankcase 28 is crooked and form, and this main support axle 67 is configured in and supports main support 68 with cooresponding position, the rear portion of power unit PB and can rotate, and this freeing pipe 94 is connected on the cylinder head 30F of anterior rake BF by the below of power unit PB.Like this, just can guarantee the configuration space of the freeing pipe 95 that guarantee at rake BR rear, rear portion, can also on other purposes, effectively utilize the space at rake BR rear, rear portion.Owing to can above the lowest part of driving engine EB, pass through freeing pipe 95, so guarantee minimum terrain clearance altitude easily, the low center of gravityization that can seek small motorcycle.

V-type engine EB, between its front and rear rake BF, BR, be bearing in the first driving engine suspension apparatus 32 ... on, be installed on the vehicle frame F, and rear portion rake BR is configured in two and is responsible for 20 ... curve 20c between, so, be to be responsible for 20 being bearing between front and rear rake BF, the BR of V-type engine EB ... middle rigidity can be installed in V-type engine EB on the vehicle frame F expeditiously than on the higher part.

Constitute and the airfilter 76B that is installed in 73 1 ones of driving engine EB bonded assembly air gulp systems on the vehicle frame F, be configured in the below of tanks 90B, setting element exchange window 136 on the filter case 78 of airfilter 76B, it is used to change the filter element 79 that is housed in this filter case 78, because element exchange window 136 faces leg by space 135 side settings, so when changing the filter element 79 of airfilter 76B, under the state that element exchange window 136 is opened, can easily just change filter element 79 by space 135 sides from leg.

The roof 82a of filter case 78 forms to such an extent that extend along front and back approximate horizontal ground with respect to the diapire 90Ba of tanks 90B, filter element 79, in order to pull out from element with exchanging window 136 approximate horizontal, and be configured in the filter case 78 with the posture with respect to roof 82a approximate horizontal, so can when fully guaranteeing tanks 90B and each self-capacity of airfilter 76B, be configured expeditiously.

The filter case 78 of airfilter 76B forms to such an extent that be the length of the length of its above-below direction less than fore-and-aft direction, is configured so can fully guarantee airfilter 76B capacity ground high efficiency.

Figure 13 is the lateral plan of third embodiment of the invention small motorcycle, Figure 14 is the vertical profile lateral plan that the front portion of autobicycle is amplified expression, illustrate only paying identical reference marks, and omit its detailed explanation with the cooresponding part of described first and second embodiment place.

The vehicle frame F of this small motorcycle is identical structure with described first and second embodiment's, be equipped with on the vehicle frame F by four-stroke driving engine EC with the output of this driving engine EC and carry out the power unit PC that the stepless speed changer M of speed change is constituted, it drives trailing wheel WR.Described driving engine EC for example is the single air cylinder structure of water-cooled, and it has: crankcase 28; Cylinder block 29 ', it has the cylinder-bore axis that leans forward and forwards extends from crankcase 28; Cylinder head 30 ', its opposition side with crankcase 28 be combined in cylinder block 29 ' on; Cylinder-cover jacket 31 ', its be combined in cylinder head 30 ' the top on.

Down pipe 18 in vehicle frame F ... the rear end nearby is arranged on described two and is responsible for 20 ... preceding half rake 20a ... on the first driving engine suspension apparatus 32 ... the top of upper support crankcase 28.Be connected in pipe 19 down ... the lower end and be installed in driving engine suspension apparatus carriage 19a ... on the second driving engine suspension apparatus 33 ... the front side bottom of upper support crankcase 28.Be provided with a pair of carriage 66 that extends upward at the rear portion that is incorporated into the variable-speed motor housing 48 on the crankcase 28 ..., it is bearing in is responsible for 20 ... rearward end on.Cross pipe 71 is erected at two and is responsible for 20 ... curve 20c ... between, and at this cross pipe 71 and be arranged on buffering on swing arm 60 front portions, being provided with posterior bumper 72 with between the carriage 60c, it has the axis that extends in front and back.

The downstream end of throttle valve body 74 be connected cylinder head 30 ' upper side on, at two down pipes 18 of crossing over vehicle frame F ... the below of the tanks 90C of configuration and be driving engine EC top configuration airfilter 76C, this airfilter 76C is connected on the upstream extremity of throttle valve body 74, and fuel injection valve 77 is installed on the throttle valve body 74.

Airfilter 76C accommodates filter element 159 and constitutes in filter case 158.Filter case 158 is by bowl-shape first housing parts of opening upward 160, be opened into bowl-shape downwards and be combined in second housing parts 161 on first housing parts 160 from the top, and forwards be opened into bowl-shape and filter element 159 be clipped between first and second housing parts 160,161 and the 3rd housing parts 162 that is combined on first and second housing parts 160,161 constitutes, in filter case 158, be divided into the not decontamination chamber 163 at filter element 159 rears and the decontamination chamber 164 in filter element 159 the place aheads.

The outside atmosphere ingress pipe 165 that is communicated with decontamination chamber 163 not faces leg and is connected the top of the 3rd housing parts 162 by space 135, by second housing parts 161 aspirate tube 166 that its downstream end is connected on throttle valve body 74 upstream extremities is housed in the decontamination chamber 164.

The radiator 91 that is cooled off usefulness by the warmed-up engine cooling water of watercooled engine EC is configured in the place ahead of this driving engine EC, and this radiator 91 is bearing in the following pipe 19 of vehicle frame F ... on.

Rearward the upstream extremity of the freeing pipe 94 of Yan Shening be connected the cylinder head 30 of driving engine EC ' lower side on, rear at power unit PC when this freeing pipe 94 rearward extends below power unit PC erects and forms to the right side of trailing wheel WR, below the diapire 48a of the variable-speed motor housing 48 of a part of housing that constitutes described power unit PC, be provided with accommodate described freeing pipe 94 tops at least accommodate recess 98, the downstream end of freeing pipe 94 is connected on the exhaust gas silencer 97 that is disposed at trailing wheel WR right side.

The head pipe 17 of vehicle frame F front end is provided with lockout mechanism 101, its changeable bogie car is 16 lock-out state and unlock state, this lockout mechanism 101 and first and second embodiment are similarly, by with the action of shaking of the corresponding linkage component 121 of operation that is configured in the cylinder lock 102 that leaves lockout mechanism 101 positions, switch bogie car 16 lock-out state and unlock state.

According to the 3rd embodiment, with described first and second embodiment similarly obtaining the space of being responsible for 20 belows bigger, increase the degree of freedom of driving engine EC shape, simultaneously, owing to can make the curve 20c that is responsible in the middle of 20 greatlyyer, so can seek the optimization of road-holding property since with down pipe 18 ... binding and the part of rigidity grow comes driving engine EC is bearing in the person in charge 20 ... on, can and be bearing on the vehicle frame F reliably driving engine EC high efficiency.

And posterior bumper 72 between the gap is set in, can be set in lower position to the diapire 140a of receiver 140, can guarantee the capacity that receiver 140 is big, can increase the volume of receiver 140 Width both sides, can be housed in the ejection-type helmet 143 in the receiver 140 effectively.

What Figure 15 represented is the fourth embodiment of the present invention, with the cooresponding part of described first～the 3rd embodiment on pay identical reference marks.

The vehicle frame F of this small motorcycle is identical structure with described first～the 3rd embodiment's, be equipped with on this vehicle frame F by four-stroke driving engine EC with the output of this driving engine EC and carry out the power unit PC that the stepless speed changer M of speed change is constituted, it drives trailing wheel WR.Cross pipe 71 is erected at two of vehicle frame F and is responsible for 20 ... curve 20c ... between, and at this cross pipe 71 and be arranged on buffering on swing arm 60 front portions and the posterior bumper 72 with the axis that extends in front and back be set between with carriage 60c.

Below by bus with seat 133, dispose the tanks 180 of accommodating parts, its upper end open portion can close with base plate 141 places at seat 133 by bus at this with opening and closing and close, the diapire 180a of this tanks 180 go up to be provided with accommodate posterior bumper 72 accommodate recess 181, make the axis of posterior bumper 72 be positioned at top position below the described diapire 180a.

Rear in described tanks 180, dispose the receiver 181 more small-sized than the receiver 140 of first～the 3rd embodiment, its upper end open portion closes described can closing with base plate 141 places at seat 133 by bus with opening and closing, can accommodate the receiver 182 of the ejection-type helmet 143, be configured in the preceding oblique upper of airfilter 76C.

According to the 4th embodiment, and posterior bumper 72 between the gap is set in, can be set in lower position to the diapire 180a of tanks 180, can guarantee that tanks 180 big fuel accommodate capacity.

Can also be useful in the structure of the 4th embodiment on the small motorcycle that V-type engine is installed.

Embodiments of the invention more than have been described, but the present invention is not limited to described embodiment, only otherwise break away from the described the present invention of patent claimed range, just can carries out various design modifications.

Claims

1, a kind of low bottom vehicle, it is characterized in that, by axle supporting wheels (WR) on the rear portion of vehicle frame (F) supporting and the swing arm (60) that can fluctuate, between swing arm (60) and vehicle frame (F), posterior bumper (72) is set, the vehicle driver take by bus with the below of seat (133) and be that the top of posterior bumper (72) disposes storage member (140,180), it is characterized in that, at described storage member (140,180) diapire (140a, the housing recess (142 of described posterior bumper (72) is accommodated in following setting 180a), 181), make the central axis of posterior bumper (72) be positioned at described diapire (140a, 180a) Xia Mian top position.

2, low bottom vehicle as claimed in claim 1 is characterized in that, described storage member is a receiver (140) of taking in helmet etc.

3, low bottom vehicle as claimed in claim 1 is characterized in that, described storage member is the tanks (180) of taking in fuel.

4, low bottom vehicle as claimed in claim 2, it is characterized in that, described posterior bumper (72) has the upwardly extending axis in front and back, and be arranged between swing arm (60) and the vehicle frame (F), described housing recess (142) is arranged on the central portion of diapire (140a) Width of described receiver (140).

5, low bottom vehicle as claimed in claim 4 is characterized in that, the described recess (142) of accommodating forms to such an extent that can be housed in the ejection-type helmet (143) in the described receiver (140) under the state that its anti-dazzle device (144) is opened.